About the expression to the left of the equals sign is not a valid target for...

Hi,

Try this function to sum two vectors. But when i send parameters it didnt work with an error message(About the expression to the left of the equals sign is not a valid target for...)

This is my function:

if true
  % 
function [y, n] = sig_mult(k1, n1, k2, n2)
n = min(min(n1), min(n2)):max(max(n1), max(n2)); 
y1 = zeros(1, length(n));
y2 = y1;
y1 = ((find(n>=min(n1)) & (n<=max(n1)) == 1)) = k1;
y2 = ((find(n>=min(n2)) & (n<=max(n2)) == 1)) = k2;
y = y1.*y2;

end

And this is my parameters to output two signals:

if true
  % >> n1 = -2:10;
n2 = 1:14;
x1 = rand(size(n1));
x2 = rand(size(n2));
stem(n1,x1,'k');
stem(n2,x2,'r');
[x3,n3] = sigadd(x1,n1,x2,n2);
Error: File: sigadd.m Line: 7 Column: 47
The expression to the left of the equals sign is not a valid target for an
assignment. 
end

[Stephen23]

You are calling sigadd, but have shown us a function named sig_mult. Please edit your question and show us the code for sigadd.